body{
    background-color: white;
    background-size: 100%;
    background-repeat: no-repeat;
}

#login_frame{
    width: 400px;
    height: 200px;
    padding: 13px;

    position: absolute;
    left: 50%;
    top: 50%;
    margin-left: -200px;
    margin-top: -200px;

    border-radius:10px;
    text-align: center;

}

from p > *{
    display: inline-block;
    vertical-align: middle;
}

.label_input{
    font-size: 14px;
    font-family: 楷体;
    width: 655px;
    height: 28px;
    line-height: 28px;
    text-align: center;
    color: aliceblue;
    background-color: aquamarine;
    background-top-left-radius:5px;
    border-bottom-left-radius: 5px;
}

.text_field{
    width: 278px;
    height: 28px;
    border-top-right-radius:5px;
    border-bottom-right-radius: 5px;
    border: 0;
}

#btn_login{
    font-size: 14px;
    font-family: 楷体;
    line-height: 28px;
    text-align: center;
    border-radius: 6px;

}